Clutch for paper-rolls.



D. HUNTER. CLUTCH FOR PAPER ROLLS. APPLICATION FILED PEB.6, 1911.

Patented July 25, 1911 7/////// V/ V// //////A Y mm M w. m m N .T w V YB m m m anion.

DAVID HUNTER, OF SEATTLE, WASHINGTON.

CLUTCH FOE PAPER-ROLLS.

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To all whom it may concern:

Be it known that I, DAVID HUNTER, a citizen of the United States, andresident of the city of Seattle, in the county of King and State oflVashington, have invented certain new and useful Improvements inClutches for Paper-Rolls, of which the following is a specification.

My invention relates to expansible mandrels or clutches, andparticularly to an expansible mandrel or clutch for holding paper rollsin printing presses.

The object of my invention is, in general, to improve and simplify suchdevices, and in particular to make them stronger and less liable tobreakage, and so that it will work to hold the roll against turning ineither direction, thereby avoiding the necessity of having to have themboth right and left handed.

My invention comprises the novel parts and combinations of parts whichwill be hereinafter described and particularly pointed out in theclaims.

In the accompanying drawings I have shown my invention in the form whichis now preferred by me, but not the only specific form in which it maybe made.

Figure l is a side view or elevation of the mandrel or clutch. Fig. 2 isa longitudinal section of the same. Fig. 3 is an end view of the device.Fig. 4 is a cross section upon the line X, X, of Fig. 1;

My invention is intended for insertion within the ends of the core uponwhich rolls of paper are formed when intended for use upon printingpresses, whereby the roll may be controlled in the tension of its webwhile being used up. As it is quite common to have the shaft upon whichthe roll is mounted, squared near the ends where the chunk is placed, Ihave shown the device as adapted for application to such a shaft, thehole being square with corners cut off. I have also shown a set screwfor securing it in place on the shaft. This-feature is however of noessential importance.

I have shown the body of the sleeve 1 as slightly tapering whereby ithas a measure of adjustment for cores of difiering size. At oppositesides the sleeve is cut away forming a surface which has a greater curvature than that of the rest of the sleeve. These cut-away segmentsextend for a considerable distance lengthwise the sleeve,

Specification of Letters Patent.

Application filed February 6, 1911.

' Patented July 25, 1911.

Serial No. 606,995.

and, as herein shown, are two in number, although one, or more than twomight be used. This leaves the exterior outline of the sleeve throughoutthe length of these segments, of an oval character. The space within thecircular out-line of the sleeve at other points, and the surface ofthese segments receive segment plates 2, which substantially completethe circle of the sleeve when in their central position. These segmentplates are held so that they are free to have a limited movementperipherally, whereby they are wedged between the sleeve 1 and theinterior of the roll, thus securely holding the roll against turningupon the shaft. The sleeve has a flange 3 at its outer or larger end.This flange has recesses 30 placed opposite the cut-away segments 10adapted to receive the arm or lug 20 which extends from thecorresponding end of the segment plate 2. These arms 20 extendlengthwise from the end of the plates 2 and then outward at rightangles. The recesses 30 in the flange 3 are each covered by a plate orring 4, which is cut-away as at lO to permit peripheral movement of thesegment plates upon the sleeve, and serve to hold said segment plates inplace but so that they may turn somewhat about the sleeve. The plates orring 4t is removably secured, as by screws 7.

In Fig. a I have shown in section, the core 5 upon which the roll ofpaper is formed. hen the chuck or mandrel is placed within this core, itwill approximately fill it. When the roll tends to turn relative to theshaft, the segment plates 2 will be caused to turn about the sleeve.This will cause these plates to wedge between the core and the sleeve 1,thereby securely holding the roll against turning. This will occur inwhichever way the turning tendency may act. It is therefore notnecessary to have these made right and left handed.

IVhat I claim as my invention is:

1. An adjustable clutch for paper rolls comprising a sleeve having anexterior surface divided into segments, certain of these segments beingconcentric the shaft and others lying wholly within the radius of saidconcentric surfaces but being of a larger radius of curvature, andsegment plates adapted to lie against said depressed segments withoutextending beyond the radius of said concentric surfaces, and means forpreventing separation of sleeve and plates while permitting limitedrelative rotation tending to overlap said plates upon theconcentric'outer surfaces of the sleeve.

A clutch for paper rolls comprising a cylindrical sleeve havingexteriorly flattened segments, plates adapted to be held upon saidflattened surfaces of the sleeve, and substantially filling out thecircle of the sleeve, one end of the sleeve having a flange providedwith slots adapted to receive said plates to retain them in position andto per mit a limited twisting action of the plates about the sleeve.

3. A clutch for paper rolls comprising a sleeve having longitudinallyextending fiattened exterior segment surfaces and having a flange at oneend provided with recesses in its face toward said segment surfaces,plates approximately filling out the circle of the sleeve when facingsaid segment surfaces, said plates having arms entering the re cesses inthe flange and a retaining ring secured to said flange and holding theplates in position.

4. A clutch for paper rolls, comprising a sleeve having longitudinalexterior segments which have a flattened curvature and a flange at oneend having recesses in its face corresponding in position with theflattened segments of the sleeve, segment plates adapted to lie upon theflattened segments of the sleeve and each having an arm extending froman end and then bending outward and lying within the recesses in theflange, and retaining plates covering said recesses and the arms of theplates to hold the plates in position to permit a limited movement ofthe plates about the sleeve.

In testimony whereof I have hereunto aflixed my signature at Seattle,Washington, this 30th day of January, 1911.

- DAVID HUNTER.

lVitnesses G. A. SPENCER, H. L. REYNOLDS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

